Avaya S8700 - Connect DC Power and Ground

81
Installing an Avaya MCC1 Media Gateway
October 2002
Connect DC Power and Ground
!
CAUTION:
Grounding of the S8700 Multi-Connect configuration shall comply with the general rules
for grounding contained in Article 250 of the National Electrical Code, NFPA 70. For
more information, refer to Approved Grounds
.
The grounding methods for the DC-powered S8700 Multi-Connect configuration are more
complex than that of an AC-powered S8700 Multi-Connect configuration.
‘‘Typical Power and Ground for a DC power cabinet’’ on page 82
shows a typical power and
ground layout for a DC power cabinet. The size of the wire required for the -48 volt DC and -48
volt return must ensure the voltage supplied by the battery plant is maintained between -42.5
and -54.2 volts DC at all times for proper operation and to prevent hardware damage. The wire
must be sized for a maximum voltage drop of 0.5 VDC in each leg of the DC distribution.
Connect DC Power and Ground
Perform these tasks to connect DC power and ground, power distribution unit (J58890CH-1
Only):
• ‘‘Install Rectifier Modules and Battery Interface Unit’’ on page 82
• ‘‘Connect Power and Ground(s)’’ on page 83
Perform these tasks to connect DC Power and Ground (J58890CF Only):
NOTE:
These installation tasks correspond to the numbers in ‘‘Typical Power and Ground for a
DC power cabinet’’ on page 82:
• ‘‘Install Coupled Bonding Conductor Wires’’ on page 86
• ‘‘Connect Grounds for DC Battery and Power Cabinets’’ on page 86
• ‘‘Connect DC Power cabinet Approved Ground’’ on page 86
• ‘‘Connect AC Power to DC Power cabinet’’ on page 87
• ‘‘Connect Ground Wires for DC Power Systems’’ on page 87
• ‘‘Turn Circuit Breakers Off’’ on page 87
• ‘‘Connect DC Power to the Media Gateways’’ on page 88
• ‘‘Connect DC Battery Cabinet to DC Power Cabinet’’ on page 89
• If necessary, ‘‘Connect Mixed AC/DC Power and Ground’’ on page 89